教程传送门 -> PostgreSQL 教程 | 菜鸟教程
(1) 连接数据库
[root@xxx ~]# psql -U postgres -h localhost
Password for user postgres:
psql (13.4)
Type "help" for help.
postgres=#
说明：
-h host 指定服务器的主机名
-p port 指定服务器监听的端口，或者 socket 文件
-U username 连接数据库的用户名
(2)查看数据库 \list
postgres-# \list
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
(3 rows)
postgres-#(3) 创建数据库
方法一：SQL命令 CREATE DATABASE
postgres=# CREATE DATABASE firstdb;
CREATE DATABASE
postgres=# \list firstdb
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
---------+----------+----------+-------------+-------------+-------------------
firstdb | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
(1 row)
postgres=#方法二：createdb命令，注：createdb 是一个 SQL 命令 CREATE DATABASE 的封装
[root@xxx bin]# pwd
/usr/pgsql-13/bin
[root@xxx bin]# createdb test -U postgres -h localhost
Password:
[root@xxx bin]#(4) 选择数据库 \c <dbname>
postgres=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
firstdb | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
test | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
(5 rows)
postgres=# \c firstdb
Password:
You are now connected to database "firstdb" as user "postgres".
firstdb=#也可以连接的时候指定数据库
[root@xxx bin]# psql -U postgres -h 127.0.0.1 firstdb
Password for user postgres:
psql (13.4)
Type "help" for help.
firstdb=#
(5) 删除数据库
方法一：SQL命令 DROP DATABASE
postgres=# DROP DATABASE test;
DROP DATABASE
postgres=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
firstdb | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
(4 rows)
postgres=#方法二：dropdb 命令
[root@xxx bin]# pwd
/usr/pgsql-13/bin
[root@xxx bin]# createdb test1 -U postgres -h localhost
Password:
[root@xxx bin]#
postgres=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
firstdb | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
test1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
(5 rows)
postgres=#
-----------------------------------------------------
[root@xxx bin]# dropdb test1 -U postgres -h localhost
Password:
[root@xxx bin]#
postgres=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
firstdb | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
(4 rows)
postgres=#(6) 创建表格 CREATE TABLE
postgres=# \c firstdb
You are now connected to database "firstdb" as user "postgres".
firstdb=#
firstdb=# CREATE TABLE COMPANY(
firstdb(# ID INT PRIMARY KEY NOT NULL,
firstdb(# NAME TEXT NOT NULL,
firstdb(# AGE INT NOT NULL,
firstdb(# ADDRESS CHAR(50),
firstdb(# SALARY REAL
firstdb(# );
CREATE TABLE
firstdb=#
firstdb=# CREATE TABLE DEPARTMENT(
firstdb(# ID INT PRIMARY KEY NOT NULL,
firstdb(# DEPT CHAR(50) NOT NULL,
firstdb(# EMP_ID INT NOT NULL
firstdb(# );
CREATE TABLE
firstdb=#(7) 查看表
查看本数据库的全部表 \d（说明：除了可以看到table，还可以看到sequence）
firstdb=# \d
List of relations
Schema | Name | Type | Owner
--------+------------+-------+----------
public | company | table | postgres
public | department | table | postgres
(2 rows)
firstdb=#查看本数据库的某张表 \d <table name>
firstdb=# \d company
Table "public.company"
Column | Type | Collation | Nullable | Default
---------+---------------+-----------+----------+---------
id | integer | | not null |
name | text | | not null |
age | integer | | not null |
address | character(50) | | |
salary | real | | |
Indexes:
"company_pkey" PRIMARY KEY, btree (id)
firstdb=#查看本数据库的某个序列 \d <sequence name>
firstdb=# \d oplog_id_seq
Sequence "public.company_id_seq"
Type | Start | Minimum | Maximum | Increment | Cycles? | Cache
--------+-------+---------+---------------------+-----------+---------+-------
bigint | 1 | 1 | 9223372036854775807 | 1 | no | 1
Owned by: public.company.id
firstdb=# (8) 删除表 DROP TABLE
firstdb=# drop table department, company;
DROP TABLE
firstdb=# \d
Did not find any relations.
firstdb=#(9) 插入 INSERT INTO
插入1行所有字段赋值
firstdb=# CREATE TABLE COMPANY(
firstdb(# ID INT PRIMARY KEY NOT NULL,
firstdb(# NAME TEXT NOT NULL,
firstdb(# AGE INT NOT NULL,
firstdb(# ADDRESS CHAR(50),
firstdb(# SALARY REAL,
firstdb(# JOIN_DATE DATE
firstdb(# );
CREATE TABLE
firstdb=#
firstdb=# INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY,JOIN_DATE) VALUES (1, 'Paul', 32, 'California', 20000.00,'2001-07-13');
INSERT 0 1插入1行部分字段赋值
firstdb=# INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,JOIN_DATE) VALUES (2, 'Allen', 25, 'Texas', '2007-12-13');
INSERT 0 1
firstdb=#说明：返回 INSERT 0 1,第2个数字代表插入的行数
插入的字段使用默认值 DEFAULT
firstdb=# INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY,JOIN_DATE) VALUES (3, 'Teddy', 23, 'Norway', 20000.00, DEFAULT );
INSERT 0 1
firstdb=#
firstdb=# SELECT * FROM COMPANY;
id | name | age | address | salary | join_date
----+-------+-----+----------------------------------------------------+--------+------------
1 | Paul | 32 | California | 20000 | 2001-07-13
2 | Allen | 25 | Texas | | 2007-12-13
3 | Teddy | 23 | Norway | 20000 |
(3 rows)
firstdb=#插入多行
firstdb=# INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY,JOIN_DATE) VALUES (4, 'Mark', 25, 'Rich-Mond ', 65000.00, '2007-12-13' ), (5, 'David', 27, 'Texas', 85000.00, '2007-12-13');
INSERT 0 2
firstdb=# SELECT * FROM COMPANY;
id | name | age | address | salary | join_date
----+-------+-----+----------------------------------------------------+--------+------------
1 | Paul | 32 | California | 20000 | 2001-07-13
2 | Allen | 25 | Texas | | 2007-12-13
3 | Teddy | 23 | Norway | 20000 |
4 | Mark | 25 | Rich-Mond | 65000 | 2007-12-13
5 | David | 27 | Texas | 85000 | 2007-12-13
(5 rows)
firstdb=#(10) 查询 SELECT
firstdb=# SELECT ID,NAME FROM company;
id | name
----+-------
1 | Paul
2 | Allen
3 | Teddy
4 | Mark
5 | David
(5 rows)
firstdb=#查询当前时间
firstdb=# SELECT CURRENT_TIMESTAMP;
current_timestamp
-------------------------------
2021-10-12 15:27:59.351699+08
(1 row)
firstdb=#(11) WHERE子句
firstdb=# SELECT * FROM COMPANY WHERE SALARY > 50000;
id | name | age | address | salary | join_date
----+-------+-----+----------------------------------------------------+--------+------------
4 | Mark | 25 | Rich-Mond | 65000 | 2007-12-13
5 | David | 27 | Texas | 85000 | 2007-12-13
(2 rows)
firstdb=#
firstdb=# SELECT * FROM COMPANY WHERE AGE >= 25 AND SALARY >= 65000;
id | name | age | address | salary | join_date
----+-------+-----+----------------------------------------------------+--------+------------
4 | Mark | 25 | Rich-Mond | 65000 | 2007-12-13
5 | David | 27 | Texas | 85000 | 2007-12-13
(2 rows)
firstdb=#@字段不为空 IS NOT NULL
firstdb=# SELECT * FROM COMPANY WHERE JOIN_DATE IS NOT NULL;
id | name | age | address | salary | join_date
----+-------+-----+----------------------------------------------------+--------+------------
1 | Paul | 32 | California | 20000 | 2001-07-13
2 | Allen | 25 | Texas | | 2007-12-13
4 | Mark | 25 | Rich-Mond | 65000 | 2007-12-13
5 | David | 27 | Texas | 85000 | 2007-12-13
(4 rows)
firstdb=#@LIKE
firstdb=# SELECT * FROM COMPANY WHERE NAME LIKE 'Pa%';
id | name | age | address | salary | join_date
----+------+-----+----------------------------------------------------+--------+------------
1 | Paul | 32 | California | 20000 | 2001-07-13
(1 row)
firstdb=#@IN
以下 SELECT 语句列出了 AGE(年龄) 字段为 25 或 27 的数据：
firstdb=# SELECT * FROM COMPANY WHERE AGE IN ( 25, 27 );
id | name | age | address | salary | join_date
----+-------+-----+----------------------------------------------------+--------+------------
2 | Allen | 25 | Texas | | 2007-12-13
4 | Mark | 25 | Rich-Mond | 65000 | 2007-12-13
5 | David | 27 | Texas | 85000 | 2007-12-13
(3 rows)
firstdb=#@NOT IN
以下 SELECT 语句列出了 AGE(年龄) 字段不为 25 或 27 的数据：
firstdb=# SELECT * FROM COMPANY WHERE AGE NOT IN ( 25, 27 );
id | name | age | address | salary | join_date
----+-------+-----+----------------------------------------------------+--------+------------
1 | Paul | 32 | California | 20000 | 2001-07-13
3 | Teddy | 23 | Norway | 20000 |
(2 rows)
firstdb=#@BETWEEN
以下 SELECT 语句列出了 AGE(年龄) 字段在 25 和 27 之间数据：
firstdb=# SELECT * FROM COMPANY WHERE AGE BETWEEN 25 AND 27;
id | name | age | address | salary | join_date
----+-------+-----+----------------------------------------------------+--------+------------
2 | Allen | 25 | Texas | | 2007-12-13
4 | Mark | 25 | Rich-Mond | 65000 | 2007-12-13
5 | David | 27 | Texas | 85000 | 2007-12-13
(3 rows)
firstdb=#(12) UPDATE语句
首先创建表COMPANY
DROP TABLE COMPANY;
CREATE TABLE COMPANY(
ID INT PRIMARY KEY NOT NULL,
NAME TEXT NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(50),
SALARY REAL
);
INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (1, 'Paul', 32, 'California', 20000.00 );
INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (2, 'Allen', 25, 'Texas', 15000.00 );
INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (3, 'Teddy', 23, 'Norway', 20000.00 );
INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (4, 'Mark', 25, 'Rich-Mond ', 65000.00 );
INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (5, 'David', 27, 'Texas', 85000.00 );
INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (6, 'Kim', 22, 'South-Hall', 45000.00 );
INSERT INTO COMPANY VALUES (7, 'James', 24, 'Houston', 10000.00 );更新该表 id = 3 的记录
firstdb=# SELECT * FROM company;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
1 | Paul | 32 | California | 20000
2 | Allen | 25 | Texas | 15000
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
5 | David | 27 | Texas | 85000
6 | Kim | 22 | South-Hall | 45000
7 | James | 24 | Houston | 10000
(7 rows)
firstdb=# UPDATE COMPANY SET SALARY = 15000 WHERE ID = 3;
UPDATE 1
firstdb=# SELECT * FROM COMPANY WHERE ID = 3;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
3 | Teddy | 23 | Norway | 15000
(1 row)
firstdb=#
更新全部记录的某字段
firstdb=# UPDATE COMPANY SET SALARY = 15000 WHERE ID = 3;
UPDATE 1
firstdb=# SELECT * FROM COMPANY WHERE ID = 3;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
3 | Teddy | 23 | Norway | 15000
(1 row)
firstdb=# UPDATE COMPANY SET ADDRESS = 'Texas', SALARY=20000;
UPDATE 7
firstdb=# SELECT * FROM company;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
1 | Paul | 32 | Texas | 20000
2 | Allen | 25 | Texas | 20000
4 | Mark | 25 | Texas | 20000
5 | David | 27 | Texas | 20000
6 | Kim | 22 | Texas | 20000
7 | James | 24 | Texas | 20000
3 | Teddy | 23 | Texas | 20000
(7 rows)
firstdb=#(13) DELETE语句
删除ID为2~4的记录
firstdb=# DELETE FROM COMPANY WHERE ID BETWEEN 2 AND 4;
DELETE 3
firstdb=# SELECT * FROM company;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
1 | Paul | 32 | Texas | 20000
5 | David | 27 | Texas | 20000
6 | Kim | 22 | Texas | 20000
7 | James | 24 | Texas | 20000
(4 rows)
firstdb=#删除整张表的数据
firstdb=# DELETE FROM COMPANY;
DELETE 4
firstdb=# SELECT * FROM company;
id | name | age | address | salary
----+------+-----+---------+--------
(0 rows)
firstdb=#(14) LIMIT 子句
取前4条记录
firstdb=# SELECT * FROM COMPANY LIMIT 4;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
1 | Paul | 32 | California | 20000
2 | Allen | 25 | Texas | 15000
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
(4 rows)
firstdb=#跳过前两条记录，从第三条记录开始取3条记录
firstdb=# SELECT * FROM COMPANY LIMIT 3 OFFSET 2;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
5 | David | 27 | Texas | 85000
(3 rows)
firstdb=#(15) ORDER BY 语句
firstdb=# SELECT * FROM COMPANY ORDER BY AGE, NAME;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
6 | Kim | 22 | South-Hall | 45000
3 | Teddy | 23 | Norway | 20000
7 | James | 24 | Houston | 10000
2 | Allen | 25 | Texas | 15000
4 | Mark | 25 | Rich-Mond | 65000
5 | David | 27 | Texas | 85000
1 | Paul | 32 | California | 20000
(7 rows)
firstdb=#
firstdb=#
firstdb=# SELECT * FROM COMPANY ORDER BY AGE, NAME DESC;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
6 | Kim | 22 | South-Hall | 45000
3 | Teddy | 23 | Norway | 20000
7 | James | 24 | Houston | 10000
4 | Mark | 25 | Rich-Mond | 65000
2 | Allen | 25 | Texas | 15000
5 | David | 27 | Texas | 85000
1 | Paul | 32 | California | 20000
(7 rows)
firstdb=# SELECT * FROM COMPANY ORDER BY AGE DESC, NAME DESC;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
1 | Paul | 32 | California | 20000
5 | David | 27 | Texas | 85000
4 | Mark | 25 | Rich-Mond | 65000
2 | Allen | 25 | Texas | 15000
7 | James | 24 | Houston | 10000
3 | Teddy | 23 | Norway | 20000
6 | Kim | 22 | South-Hall | 45000
(7 rows)
firstdb=# SELECT * FROM COMPANY ORDER BY AGE DESC, NAME;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
1 | Paul | 32 | California | 20000
5 | David | 27 | Texas | 85000
2 | Allen | 25 | Texas | 15000
4 | Mark | 25 | Rich-Mond | 65000
7 | James | 24 | Houston | 10000
3 | Teddy | 23 | Norway | 20000
6 | Kim | 22 | South-Hall | 45000
(7 rows)
firstdb=#
(16) GROUP BY 语句
firstdb=# SELECT * FROM COMPANY ORDER BY NAME;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
2 | Allen | 25 | Texas | 15000
5 | David | 27 | Texas | 85000
7 | James | 24 | Houston | 10000
10 | James | 45 | Texas | 5000
9 | James | 44 | Norway | 5000
6 | Kim | 22 | South-Hall | 45000
4 | Mark | 25 | Rich-Mond | 65000
1 | Paul | 32 | California | 20000
8 | Paul | 24 | Houston | 20000
3 | Teddy | 23 | Norway | 20000
(10 rows)
firstdb=# SELECT NAME, SUM(SALARY) FROM COMPANY GROUP BY NAME ORDER BY NAME;
name | sum
-------+-------
Allen | 15000
David | 85000
James | 20000
Kim | 45000
Mark | 65000
Paul | 40000
Teddy | 20000
(7 rows)
firstdb=#
(17) WITH 子句
http://www.jasongj.com/sql/cte/
(18) HAVING 子句
说明：HAVING 子句必须放置于 GROUP BY 子句后面，ORDER BY 子句前面
firstdb=# SELECT * FROM COMPANY;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
1 | Paul | 32 | California | 20000
2 | Allen | 25 | Texas | 15000
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
5 | David | 27 | Texas | 85000
6 | Kim | 22 | South-Hall | 45000
7 | James | 24 | Houston | 10000
(7 rows)
firstdb=#
firstdb=# SELECT NAME FROM COMPANY GROUP BY name HAVING count(name) < 2;
name
-------
Teddy
David
Paul
Kim
Mark
Allen
James
(7 rows)
firstdb=# INSERT INTO COMPANY VALUES (8, 'Paul', 24, 'Houston', 20000.00);
INSERT 0 1
firstdb=# INSERT INTO COMPANY VALUES (9, 'James', 44, 'Norway', 5000.00);
INSERT 0 1
firstdb=# INSERT INTO COMPANY VALUES (10, 'James', 45, 'Texas', 5000.00);
INSERT 0 1
firstdb=# SELECT * FROM COMPANY;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
1 | Paul | 32 | California | 20000
2 | Allen | 25 | Texas | 15000
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
5 | David | 27 | Texas | 85000
6 | Kim | 22 | South-Hall | 45000
7 | James | 24 | Houston | 10000
8 | Paul | 24 | Houston | 20000
9 | James | 44 | Norway | 5000
10 | James | 45 | Texas | 5000
(10 rows)
firstdb=#
firstdb=# SELECT address FROM COMPANY GROUP BY address HAVING count(address) > 1;
address
----------------------------------------------------
Houston
Norway
Texas
(3 rows)
firstdb=# SELECT address FROM COMPANY GROUP BY address HAVING count(address) > 2;
address
----------------------------------------------------
Texas
(1 row)
firstdb=#
（19）DISTINCT 关键字
firstdb=# INSERT INTO COMPANY VALUES (11, 'James', 45, 'Texas', 15000.00);
INSERT 0 1
firstdb=#
firstdb=# SELECT address,name FROM COMPANY;
address | name
----------------------------------------------------+-------
California | Paul
Texas | Allen
Norway | Teddy
Rich-Mond | Mark
Texas | David
South-Hall | Kim
Houston | James
Houston | Paul
Norway | James
Texas | James
Texas | James
(11 rows)
firstdb=# SELECT DISTINCT address,name FROM COMPANY;
address | name
----------------------------------------------------+-------
Texas | James
Norway | James
Rich-Mond | Mark
Texas | Allen
Houston | James
California | Paul
Houston | Paul
Texas | David
South-Hall | Kim
Norway | Teddy
(10 rows)
firstdb=# SELECT DISTINCT address FROM COMPANY;
address
----------------------------------------------------
Rich-Mond
Houston
South-Hall
California
Norway
Texas
(6 rows)
firstdb=# SELECT DISTINCT NAME FROM COMPANY;
name
-------
Teddy
David
Paul
Kim
Mark
Allen
James
(7 rows)
firstdb=#
firstdb=# SELECT * FROM COMPANY;
id | name | age | address | salary
----+-------+-----+----------------------------------------------------+--------
1 | Paul | 32 | California | 20000
2 | Allen | 25 | Texas | 15000
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
5 | David | 27 | Texas | 85000
6 | Kim | 22 | South-Hall | 45000
7 | James | 24 | Houston | 10000
8 | Paul | 24 | Houston | 20000
9 | James | 44 | Norway | 5000
10 | James | 45 | Texas | 5000
11 | James | 45 | Texas | 15000
(11 rows)
firstdb=#